[tor-bugs] #27845 [Applications/Tor Browser]: Tor Browser 8.0.1 - on MacOS desktop platforms, the default Tor Browser window size is 1000 Wide x 0998 High, not 1000 Wide x 1000 High. Is this a defect?

[Tor Bug Tracker & Wiki]

#27845: Tor Browser 8.0.1 - on MacOS desktop platforms, the default Tor Browser
window size is 1000 Wide x 0998 High, not 1000 Wide x 1000 High. Is this a
defect?
-------------------------------------------+-------------------------------
 Reporter:  monmire                        |          Owner:  tbb-team
     Type:  defect                         |         Status:
                                           |  needs_information
 Priority:  High                           |      Milestone:
Component:  Applications/Tor Browser       |        Version:
 Severity:  Normal                         |     Resolution:
 Keywords:  tbb-fingerprinting-resolution  |  Actual Points:
Parent ID:                                 |         Points:
 Reviewer:                                 |        Sponsor:
-------------------------------------------+-------------------------------

Comment (by monmire):

 > gk asked: Does this happen with a clean, new Tor Browser 8 (you could
 drag one to your desktop and start Tor Browser from there for testing
 purposes?

 Yes, this (1000 Wide x 0998 High) happens with a clean, new Tor Browser
 8.0, 8.0.1, and 8.5a2.

 > gk asked: And previously, with Tor Browser 7 this was a non-issue?

 Yes, with Tor Browser 7.5.6 (and earlier Tor Browser versions) this was a
 non-issue. With Tor Browser 7.5.6 (and earlier Tor Browser versions), the
 default Tor Browser-window size is 1000 Wide x 1000 High.

 > gk asked: Which macOS system are you on?

 macOS 10.10.5, iMac desktop computer

 monmire requests: Please request that Tor Project immediately release a
 new Tor Blog warning all Tor Browser 8.0.1 and 8.5a2 clients on macOS
 desktop computers that the default Tor Browser-window size on macOS
 desktop computers now apparently is different from the default Tor
 Browser-window size on Windows and Linux desktop computers.

 monmire asks: What is the default Tor Browser 8.0.1 and 8.5a2-window size
 supposed to be on macOS, Linux, and Windows desktop computers—1000 x 1000,
 1000 x 0998, 900 x 900, 832 x 830, or some other random sizes? Apparently,
 Tor Project publishes no documentation for macOS, Windows, and Linux users
 needing such information, except for the following documentation:
 - The Design and Implementation of the Tor Browser [DRAFT]
  - 4.6 Cross-Origin Fingerprinting Unlinkability
   - Specific Fingerprinting Defenses in the Tor Browser
    - 7. Monitor, Widget, and OS Desktop Resolution Implementation Status:
     - "As an alternative to zoom-based solutions we are testing a
 different approach in our alpha series that tries to round the browser
 window at all times to a multiple 200x100 pixels."

 monmire asks: Beginning with Tor Browser 8.0, is the preceding
 fingerprinting-defense specification of "a multiple 200x100 pixels"
 unachievable or no longer a Tor Project priority?

 monmire asks: are Tor Browser 8.0.1 and 8.5a2 now dangerous for macOS
 desktop computer users because adversaries more easily can identify,
 track, and deanonymize macOS desktop users separately from Windows and
 Linux desktop users due to differences in the default Tor Browser-window
 sizes on macOS, Windows, and Linux desktop computers?

 monmire asks: Is the size difference between the default Tor Browser-
 window size on macOS desktop computers on one side and Windows and Linux
 desktop computers on the other side indicative of Tor Project plans to
 drop support for Tor Browser on macOS?

 monmire asks: Does Tor Project recommend Tor Browser clients using macOS
 desktop computers, needing to preserve their anonymity and protect their
 privacy, discard macOS and instead use Windows or Linux desktop computers
 because, beginning with Tor Browser 8.0, the default Tor Browser-window
 size is different on macOS desktop computers in comparison with Tor
 Browser clients using Windows and Linux desktop computers?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27845#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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